1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* { dg-require-effective-target vect_float } */
#include <stdarg.h>
#include "tree-vect.h"
#define N 256
__attribute__ ((noinline))
void bar (float *pa, float *pb, float *pc)
{
int i;
/* check results: */
for (i = 0; i < N/2; i++)
{
if (pa[i+1] != (pb[i+1] * pc[i+1]))
abort ();
}
return;
}
/* Unaligned pointer accesses, with a known alignment.
The loop bound is known and divisible by the vectorization factor.
No aliasing problems.
vect-58.c is similar to this one with one difference:
the loop bound is unknown. */
float b[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};
float c[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
__attribute__ ((noinline)) int
main1 ()
{
int i;
float a[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
float *pa = a;
float *pb = b;
float *pc = c;
for (i = 0; i < N/2; i++)
{
pa[i+1] = pb[i+1] * pc[i+1];
}
bar (a,b,c);
return 0;
}
int main (void)
{
int i;
check_vect ();
main1 ();
return 0;
}
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 0 "vect" } } */
/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" } } */
/* { dg-final { cleanup-tree-dump "vect" } } */
|
